By Olesya Astakhova MOSCOW (Reuters) - Any further Western sanctions which may aim at technology for Russia's modernizing oil refineries could lead to gasoline shortages, an energy ministry official said. The latest Western sanctions, imposed on Friday, have targeted technology for Russia's Arctic oil exploration and shale oil projects. Yury Zolotnikov, a deputy head of the oil refining department, said his ministry already expected gasoline shortages next year and in 2016, with Russia on "a dangerous balance" of production only marginally higher than consumption.